求助翻译一句话

vike

Open splits and face edge joints: individually, 5mm maximum measured across the grain and the full sheet in the direction of the grain.
5mm maximum measured across the grain and the full sheet in the direction of the grain.

是建材方面说木板质量的，一直想不出来怎么翻译合适，跪求高人。特别是这个grain不知道怎么样解释

azurechris

木纹？

diaoni

only ppl with carpentry experience or builder exp can help...sorry mate...
just go down the st and ask some tradies for help

wjsmelb

太专业，不懂。帮顶。